%0 Generic %1 karman2015highlyionized %A Karman, W. %A Grillo, C. %A Balestra, I. %A Rosati, P. %A Caputi, K. I. %A Di Teodoro, E. %A Fraternali, F. %A Gavazzi, R. %A Mercurio, A. %A Prochaska, J. X. %A Rodney, S. %A Treu, T. %D 2015 %K delay emission ionisation supernovae %T A highly-ionized region surrounding SN Refsdal revealed by MUSE %U http://arxiv.org/abs/1509.07515 %X Supernova (SN) Refsdal is the first multiply-imaged, highly-magnified, and spatially-resolved SN ever observed. The SN exploded in a highly-magnified spiral galaxy at z=1.49 behind the Frontier Fields Cluster MACS1149, and provides a unique opportunity to study the environment of SNe at high z. We exploit the time delay between multiple images to determine the properties of the SN and its environment, before, during, and after the SN exploded. We use the integral-field spectrograph MUSE on the VLT to simultaneously target all observed and model-predicted positions of SN Refsdal. We find MgII emission at all positions of SN Refsdal, accompanied by weak FeII* emission at two positions. The measured ratios of OII to MgII emission of 10-20 indicate a high degree of ionization with low metallicity. Because the same high degree of ionization is found in all images, it cannot be caused by SN Refsdal, but rather by previous SNe or a young and hot stellar population. We find no variability of the OII line over a period of 57 days. This suggests that there is no variation in the OII luminosity of the SN over this period, or that the SN contribution to the OII emission is too small to distinguish with our observations.

@misc{karman2015highlyionized, abstract = {Supernova (SN) Refsdal is the first multiply-imaged, highly-magnified, and spatially-resolved SN ever observed. The SN exploded in a highly-magnified spiral galaxy at z=1.49 behind the Frontier Fields Cluster MACS1149, and provides a unique opportunity to study the environment of SNe at high z. We exploit the time delay between multiple images to determine the properties of the SN and its environment, before, during, and after the SN exploded. We use the integral-field spectrograph MUSE on the VLT to simultaneously target all observed and model-predicted positions of SN Refsdal. We find MgII emission at all positions of SN Refsdal, accompanied by weak FeII* emission at two positions. The measured ratios of [OII] to MgII emission of 10-20 indicate a high degree of ionization with low metallicity. Because the same high degree of ionization is found in all images, it cannot be caused by SN Refsdal, but rather by previous SNe or a young and hot stellar population. We find no variability of the [OII] line over a period of 57 days. This suggests that there is no variation in the [OII] luminosity of the SN over this period, or that the SN contribution to the [OII] emission is too small to distinguish with our observations.}, added-at = {2015-09-28T10:37:49.000+0200}, author = {Karman, W. and Grillo, C. and Balestra, I. and Rosati, P. and Caputi, K. I. and Di Teodoro, E. and Fraternali, F. and Gavazzi, R. and Mercurio, A. and Prochaska, J. X. and Rodney, S. and Treu, T.}, biburl = {https://www.bibsonomy.org/bibtex/274e2f57c5fdf5c4fb15114dec74ca4a9/miki}, description = {[1509.07515] A highly-ionized region surrounding SN Refsdal revealed by MUSE}, interhash = {009bc248e57b5ef1d4997f61559cd637}, intrahash = {74e2f57c5fdf5c4fb15114dec74ca4a9}, keywords = {delay emission ionisation supernovae}, note = {cite arxiv:1509.07515Comment: 4 pages, 4 figures, submitted to A&A}, timestamp = {2015-09-28T10:37:49.000+0200}, title = {A highly-ionized region surrounding SN Refsdal revealed by MUSE}, url = {http://arxiv.org/abs/1509.07515}, year = 2015 }